过膨胀状态下单边膨胀喷管内壁面压力非定常特性试验研究

doi:10.13675/j.cnki.tjjs.190302

推进技术 ›› 2020, Vol. 41 ›› Issue (3): 537-543.DOI: 10.13675/j.cnki.tjjs.190302

过膨胀状态下单边膨胀喷管内壁面压力非定常特性试验研究

何成军¹,李建强¹,范召林¹,李耀华²,高荣钊¹,梁锦敏¹,苗磊¹

1.中国空气动力研究与发展中心高速空气动力研究所，四川绵阳621000;2.南京航空航天大学航空宇航学院，江苏南京210016

发布日期:2021-08-15

Experimental Investigation of Wall Pressure Unsteadiness in an Over-Expanded Single Expansion Ramp Nozzle

1.High Speed Aerodynamics Institute,China Aerodynamics Research and Development Center,Mianyang621000,China;2.College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing210016，China

Published:2021-08-15

摘要/Abstract

摘要： 为获得单边膨胀喷管（SERN）过膨胀状态下壁面压力非定常特性，在喷管落压比（NPR）为7.54和9.98两种状态下，采用动态压力传感器对SERN壁面压力进行试验测量，并结合聚焦纹影观测流场。结果表明：在两种落压比条件下，喷管下壁面分离模态均为自由激波分离（FSS）；NPR=7.54条件下，喷管上壁面分离模态为受限激波分离（RSS）；而在NPR=9.98条件下，喷管上壁面分离剪切层间歇性地撞击喷管壁面，导致喷管出口附近壁面压力间歇性的高于环境压力，流动分离模态为部分受限激波分离（pRSS）。不同分离模态下，上游未受扰动区域壁面压力脉动主频均接近于6kHz，喷管内流动分离点呈现宽低频振荡特性。RSS模态下，分离点附近壁面压力脉动具有相对独立主频，而在FSS和pRSS模态下无明显独立主频。

关键词: 单边膨胀喷管;过膨胀状态;受限激波分离;自由激波分离;低频振荡

Abstract: To evaluate the unsteadiness of wall pressure in an over-expanded single expansion ramp nozzle，under fixed nozzle pressure ratio (NPR) 7.54 and 9.98，respectively，an experimental investigation has been conducted based on dynamic pressure measurement and focus schlieren techniques. Under bothNPRs，the tests showed free shock separation (FSS) is formed on the lower wall. On the upper wall atNPR=7.54，the separation mode is fully restricted shock separation (RSS). However，the separated shear-layer can come in very close proximity to the lower wall and randomly impinges on it atNPR=9.98，so that wall pressure signal near the nozzle exit randomly alternates between its value in the backflow region and that above ambient，the separation mode is partially restricted shock separation (pRSS). Under different separation modes，the peak frequency of the wall pressure pulsation in the upstream undisturbed zone is close to 6kHz，and near the flow separation point in the nozzle exhibits low broadband frequency oscillation characteristics. In the RSS mode，the wall pressure pulsation near the separation point has a relatively distinct dominant frequency，while in the FSS and pRSS modes，there is no obvious distinct dominant frequency.

何成军,李建强,范召林,李耀华,高荣钊,梁锦敏,苗磊. 过膨胀状态下单边膨胀喷管内壁面压力非定常特性试验研究[J]. 推进技术, 2020, 41(3): 537-543.

HE Cheng-jun¹,LI Jian-qiang¹,FAN Zhao-lin¹,LI Yao-hua²,GAO Rong-zhao¹,LIANG Jin-min¹,MIAO Lei¹. Experimental Investigation of Wall Pressure Unsteadiness in an Over-Expanded Single Expansion Ramp Nozzle[J]. Journal of Propulsion Technology, 2020, 41(3): 537-543.

参考文献

[1] Mitani T，Ueda S，Tani K，et al.Validation Studies of Scramjet Nozzle Performance[J].Journal of Propulsion and Power，1993，9(5):725-730.
[2] 唐兰，徐惊雷，莫建伟，等.基于壁面压力分布的单边膨胀喷管反设计及试验验证[J].推进技术，2016，37（12:2226-2232.
[3] Mirmirani M，Wu C，Clark A，et al.Modeling for Control of a Generic Airbreathing Hypersonic Vehicle[R].AIAA2005-6256.
[4] 莫建伟.TBCC 排气系统设计方法及流场特性研究[D].南京:南京航空航天大学，2015.
[5] 徐惊雷，张艳慧，张堃元.超燃冲压发动机非对称喷管非设计状态性能计算[J].推进技术，2007，283):287-290.(XU Jing-lei， ZHANG Yan-hui， ZHANG Kun-yuan.Numerical Simulation of Single Expansion Ramp Nozzle for Scramjet on the Off-Design Point[J].Journal of Propulsion Technology，2007，28(3）:287-290.)
[6] Summerfield M，Foster C，Swan W.Flow Separation in Overexpanded Supersonic Exhaust Nozzles[J].Jet Propulsion，1954，24(9):319-321.
[7] Nave L H，Coffey G A.Sea-Level Side Loads in High-Area-Ratio Rocket Engines[R].AIAA73-1284.
[8] Dumnov G E.Unsteady Side-Load Acting on the Nozzle with Developed Separation Zone[R].AIAA96-3220.
[9] Frey M，Hagemann G.Status of Flow Separation Prediction in Rocket Nozzles[R].AIAA98-3619.
[10] ?stlund J，Damgaard T，Frey M.Side-Load Phenomena in Highly Overexpanded Rocket Nozzles[J].Journal of Propulsion and Power，2004，20(4):695-704.
[11] Engblom W A.Numerical Prediction of SERN Performance Using WIND Code[R].AIAA2003-4410.
[12] 谭杰，金捷，杜刚，等.过膨胀单边膨胀喷管试验和数值模拟[J].推进技术，2009，30(3):292-296.
[13] 谭杰，金捷，杜刚，等.单边膨胀喷管试验和数值模拟[J].航空动力学报，2011，26(6).
[14] Yu Y，Xu J，Mo J，et al.Principal Parameters in Flow Separation Patterns of Over-Expanded Single Expansion Ramp Nozzle[J].Engineering Applications of Computational Fluid Mechanics，2014，8(2):274-288.
[15] Yu Y，Xu J，Wang M.The Separation Pattern Transition Phenomena and Its Effects on the SERN Performance[R].AIAA2012-5931.
[16] Yu Y，Xu J，Yu K，et al.Unsteady Transitions of Separation Patterns in Single Expansion Ramp Nozzle[J].Shock Waves，2015，25(6):623-633.
[17] Yu Y，Xu J，Mo J，et al.Numerical Investigation of Separation Pattern and Separation Pattern Transition in OverExpanded Single Expansion Ramp Nozzle[J].The Aeronautical Journal，2014，118(1202):399-424.
[18] Verma S B，Haidn O.Study of Restricted Shock Separation Phenomena in a Thrust Optimized Parabolic Nozzle[J].Journal of Propulsion and Power，2009，25(5):1046-1057.

过膨胀状态下单边膨胀喷管内壁面压力非定常特性试验研究

Experimental Investigation of Wall Pressure Unsteadiness in an Over-Expanded Single Expansion Ramp Nozzle

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